Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cb5c3a19d3288d…

MALICIOUS

PDF

78.0 KB Created: 2021-08-20 00:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d8e13deac0bd984b06844a550adc466 SHA-1: 86e9248e5598553210d4ae424a320dd60356b6e3 SHA-256: c2cb5c3a19d3288d0ca928663e9f668b72b50ae46ec2115ec25476d5f26abbfe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. This pattern is commonly used to distribute phishing lures or redirect users to sites hosting malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9142

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://animationcoach.com/userfiles/file/nigobijezozexitavubasat.pdf In PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/xobesowurazix.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/61928711559.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/viwid.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/betegojememufez.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/2365927689.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1626497037.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/pewogegevixiriretode.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/49767166152.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/140547070531fe4b473f3a567661f87a/90733623816.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/30107170649.pdfIn PDF document text
    • http://cocoal.com/uploads/file/fusawekofobumal.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add6df6cc62---sepojilekajudemujopagibex.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6698756245---73702741621.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160807be01ebb6---24228466884.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/27094347406.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5119ea33a---55445524113.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/najuzemarizipasidewunowu.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/86k7u4ihu9moeftnrkdqurvq9h/19426085722.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f823c396e306d5d9697fc46e34375f56/94205539993.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/ledubizigezebobutiwow.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/93672257372.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/0obdoppevlao492jh9btujls13/31239147042.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbecf8dd94---34787750757.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/14410262891.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=misumi+spring+catalogue+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB44 11056 bytes
SHA-256: d83f497b105cc1df7e2c9009684278a636cd39640924733207f0a7d2fe94691b
font_01_sfnt_off0000f4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CC 18016 bytes
SHA-256: a5184025b8e0bd465cfa61a593b0565da9b6cc35c892a0f72dd88f899b651b12
font_02_sfnt_off00012401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1